A triangular shell element for nonlinear analysis of thin-walled structures | |
| Author | Silva, S. H. M. A. P. K. De |
| Call Number | AIT Thesis no.ST-03-16 |
| Subject(s) | Thin-walled structures Finite element method |
| Note | A thesis submitted in paitial fulfillment of the requirement for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | A new family of thin shell triangles with translational degree of freedom as the only nodal variable is successfully formulated for thin shell analysis using a combination of the finite element methods and finite volume methods. It has only eighteen translational degrees of freedom per patch and is based on a Total Lagrange formulation. A plane stress condition with isotropic material behavior is assumed. In this formulation, resorting to the surrounding elements (patch of four elements), the average curvatures are computed by adopting finite volume approximations. The membrane contribution to the present element is simply provided by the Constant Strain Triangle under plane stress condition. All the formulations are carried out explicitly using only the global co-ordinate system to reduce computational time. At the boundaries where there is no adjacent element to a side, a special consideration is done individually according to clamped, symmetric axis, simple supported and free boundary conditions. In the nonlinear analysis, Von Kaman approach is used allowing only to geometric stiffness contributing from membrane to reduce computational time in nonlinear analysis. Several examples are shown to validate the performance of the present formulation. |
| Year | 2003 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Kim, Kidu; |
| Examination Committee(s) | Worsak Kanok-Nukulchai;Barry, William J.; |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2003 |